Gas sensing properties of Nd2O3 nanostructured microspheres

被引:49
作者
Michel, Carlos R. [1 ]
Martinez-Preciado, Alma H. [1 ]
Lopez Contreras, Narda L. [1 ]
机构
[1] Univ Guadalajara CUCEI, Dept Fis, Guadalajara 44410, Jalisco, Mexico
关键词
Nd2O3; Nanostructured microspheres; Gas sensors; Impedance; NEODYMIUM OXIDE NANOPARTICLES; RARE-EARTH-OXIDES; THIN-FILMS; UP-CONVERSION; METAL-OXIDES; ADSORPTION; PARTICLES; SENSORS; COMBUSTION; CONDUCTION;
D O I
10.1016/j.snb.2013.04.044
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Nd2O3 microspheres were prepared by a solution-coprecipitation method. The dissolution of neodymium nitrate in formic acid produced, at room temperature, semispherical particles of neodymium formate (Nd(HCOO)(3)). The size of these particles was in the range 0.5 to 1.4 mu m. The thermal decomposition at 600 degrees C transformed Nd(HCOO)(3) to single-phase Nd2O3, with cubic crystal structure. A decrease of size of similar to 15% also took place. A detailed inspection of their surface revealed the formation of a sponge-like solid, possessing extensive nanoporosity. The gas sensing characterization was performed on thick films made with the as-prepared Nd2O3 microspheres. Based in the response to the test gases an n-type semiconductor behavior was observed. A reliable detection of CO was observed from 300 degrees C, using an applied frequency of 100 kHz; however, better results were obtained at 400 degrees C. For CO2, the best results were registered at 400 degrees C and 100 kHz; whereas in ethanol vapor these were obtained at lower temperature and frequency (300 degrees C and 100 Hz). Quantitative detection of CO and ethanol vapor was achieved; however, the results were not satisfactory for CO2. (c) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:8 / 14
页数:7
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共 50 条
[1]   The binary rare earth oxides [J].
Adachi, G ;
Imanaka, N .
CHEMICAL REVIEWS, 1998, 98 (04) :1479-1514
[2]   THE HEAT CONTENT, SPECIFIC HEAT AND ENTROPY OF LA2O3, PR6O11 AND ND2O3 BETWEEN 30-DEGREES AND 900-DEGREES [J].
BLOMEKE, JO ;
ZIEGLER, WT .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1951, 73 (11) :5099-5102
[3]  
Brophy J.J., 1985, BASIC ELECT SCI
[4]   METHANE ACTIVATION BY THE LANTHANIDE OXIDES [J].
CAMPBELL, KD ;
ZHANG, H ;
LUNSFORD, JH .
JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (03) :750-753
[5]   Nano neodymium oxide induces massive vacuolization and autophagic cell death in non-small cell lung cancer NCI-H460 cells [J].
Chen, Y ;
Yang, LS ;
Feng, C ;
Wen, LP .
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 2005, 337 (01) :52-60
[6]   DIELECTRIC-PROPERTIES OF ELECTRON-BEAM-EVAPORATED ND2O3 THIN-FILMS [J].
DHARMADHIKARI, VS ;
GOSWAMI, A .
THIN SOLID FILMS, 1982, 87 (02) :119-126
[7]   Stabilization of Neodymium Oxide Nanoparticles via Soft Adsorption of Charged Polymers [J].
Dorris, Annie ;
Sicard, Clemence ;
Chen, Mark C. ;
McDonald, Arthur B. ;
Barrett, Christopher J. .
ACS APPLIED MATERIALS & INTERFACES, 2011, 3 (09) :3357-3365
[8]   NEODYMIUM SESQUIOXIDE, ND2O3, FORM-A [J].
DOUGLASS, RM .
ANALYTICAL CHEMISTRY, 1956, 28 (04) :551-552
[9]   ENTHALPY OF FORMATION OF ND2O3-HEXAGONAL [J].
FITZGIBR.GC ;
PAVONE, D ;
HOLLEY, CE .
JOURNAL OF CHEMICAL AND ENGINEERING DATA, 1968, 13 (04) :547-&
[10]   A NONLINEAR DIFFUSION-REACTION MODEL OF ELECTRICAL-CONDUCTION IN SEMICONDUCTOR GAS SENSORS [J].
GARDNER, JW .
SENSORS AND ACTUATORS B-CHEMICAL, 1990, 1 (1-6) :166-170